MA-025
–
DGA 900 Operator Guide
–
Rev 2.0
12-Apr-19
Page 46 of 92
6.11.6.1
Alarm Reflash
The Alarm Reflash option
ensures that a relay’s digital output reflashes
(if already
activated) when another source triggers the same relay. An alarm reflash applies only to
relays 1-6 and is achieved by deactivating the relevant digital output for a duration of 1
second before reactivating it to achieve a flashing effect. This signifies to an operator or
control room in real time that multiple sources have triggered the same relay.
Note:
This ensures that further alarms raised by the same source have no further
effect.
6.11.6.2
Clear Historical Data Only
Clears all historical data
—
DGA measurements, alarm data and Transopto measurements.
Table 6-2 outlines the type of data items that get erased.
6.11.6.3
Reset Configuration Settings
Clears all historical data described previously
and
resets configuration settings (
except
Communications) to the default state. Table 6-2 outlines the type of data items that get
erased.
